potassium hydroxide; iodine 1.) methylene dichloride, 2 h, 2.) toluene, reflux, 6 h; Yield given. Multistep reaction;

1: 2-n-octylthiophene With n-butyllithium in tetrahydrofuran T=-78°C; 2: N,N-dimethyl-formamide in tetrahydrofuran T=-78 - 20°C;

1: 2-n-octylthiophene With n-butyllithium in tetrahydrofuran; hexane T=20°C; 1 h; 2: 1-piperidinecarboxaldehyde in tetrahydrofuran; hexane 6 h; Further stages.;

1.1: n-butyllithium / tetrahydrofuran; hexane / 1 h / 20 °C 1.2: 71 percent / tetrahydrofuran; hexane / 6 h 2.1: n-butyllithium / tetrahydrofuran; hexane / 1 h / 20 °C 2.2: 65 percent / tetrahydrofuran; hexane / 6 h View Scheme

1: hydrazine 2: phosphoryl chloride View Scheme

trichlorophosphate